I found this thread and I am always compelled to share my testimony on this point, just because of the very unique and personal way God revealed this to me. Several years ago when my wife and I were actively seeking out churches and just trying to learn as much as possible about everything spiritual, we finally found our way into a pentecostal church. There was a great amount of nonsense going on in this one church in particular, for one there was virtually no preaching just a worship service and lots of "ecstatic" activity. So of course being a believer and enjoying the praise and worship I wanted to experience this gift that EVERYONE at this particular church seemed to have. So I would try to get into the mode of things but it all seemed SO CONTRIVED. However, I read the scriptures and came to the conclusion that there were two types of tongues mentioned. I felt like one was for interpretation and one was for edification in private prayer, and that neither were for EVERYONE in any congregation. I could see that there was much contrived fakery going on for the sake of fitting in. That being said, personally I had serious faith issues over it, and was in my heart very very skeptical and very doubtful that my interpretation was correct almost to the point of disbelief or even maybe that it was something that had truly ceased. I am one that shuns the contrived and I felt like much of this was going on for show. Months later my wife was out of town visiting family and I was alone in the house. I spent some time in praise and worship alone, just spending time with God, I was also reading scripture and praying. This is when God took the reigns. I had just finished a passage of scripture and not thinking too deeply on what it could relate to, I read through the remainder of the chapter and began praising God by singing. This is when it happened, I began speaking uncontrollably in that "Heavenly tongue". It burst forth from me to my complete shock! For nearly an hour this continued, I began messaging and sharing with my wife because it literally would not stop. I found that I was also able to think independently and text and pray in tongues. Since that day I pray regularly in the heavenly tongue, I don't have to muster any emotion, work up anything like that, I just can do it on demand. Thats how God proved it to me IN my skepticism. I do not do this in company, only with my wife and children, and most of all in private prayer. I went back afterwards to review the scripture I had read, and thats when the realization just hit my spirit that this was completely true. This is the verse: Ephesians 5:18-19 "And be not drunk with wine wherein is excess; but be filled with the spirit; speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord". That day made a huge impact on my faith. I believe that I was given this gift to balance out my analytical mind and let me experience God in a different way, as well as to intercede for others when prompted. I also believe God did this in private in the way he did so I could not feel that it was contrived.